I go to Pitt, and this is what I know: the acceptance letters have been printed out, and in case of acceptance, copies have been sent to the mailboxes of 1. Your faculty interviewer, and 2. your student interviewer. In most cases, you should hear from both of them, offering their congratulations. I do not know whether ALL acceptances from pre-February interviews are sent out in one batch. Most likely, you should hear back very soon, if you haven't already. If anyone has any questions about Pitt, I'd be happy to try to answer them.